towers and speakers

i realize this isnt the wright post to ask this question on but anyways . i have a skichanlenger that puts up a nice wake but im riding with a high fly and i just learned railys the other day and when i cut in as hard as i have to it gives and i loose some of my timing. so im trying to talk my dad into geting a tower. what is the cheapest kind besides a monkey bar. a tower thats good but not as expensive as the ones on x stars and wakeseters . just a good long lasting solid one. and my sound system blows when u take off the v8 roars and u cant hear the tunes so i nead to know if i need new speakers or an amp to push it thanks plz help me with this one cuz i want to get out there on that tower asap.